common/cmd_dynenv.c

   1 /*
   2  * (C) Copyright 2006-2007 OpenMoko, Inc.
   3  * Author: Harald Welte <laforge@openmoko.org>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  18  * MA 02111-1307 USA
  19  */
  20
  21 #include <common.h>
  22 #include <command.h>
  23 #include <malloc.h>
  24 #include <environment.h>
  25 #include <nand.h>
  26 #include <asm/errno.h>
  27
  28 #if defined(CFG_ENV_OFFSET_OOB)
  29
  30 int do_dynenv(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  31 {
  32         struct mtd_info *mtd = &nand_info[0];
  33         int ret, size = 8;
  34         uint8_t *buf;
  35
  36         char *cmd = argv[1];
  37
  38         buf = malloc(mtd->oobsize);
  39         if (!buf)
  40                 return -ENOMEM;
  41
  42         if (!strcmp(cmd, "get")) {
  43                 ret = mtd->read_oob(mtd, 8, size, (size_t *) &size, (u_char *) buf);
  44
  45                 if (buf[0] == 'E' && buf[1] == 'N' &&
  46                     buf[2] == 'V' && buf[3] == '0')
  47                         printf("0x%08x\n", *((u_int32_t *) &buf[4]));
  48                 else
  49                         printf("No dynamic environment marker in OOB block 0\n");
  50
  51         } else if (!strcmp(cmd, "set")) {
  52                 unsigned long addr;
  53                 if (argc < 3)
  54                         goto usage;
  55
  56                 buf[0] = 'E';
  57                 buf[1] = 'N';
  58                 buf[2] = 'V';
  59                 buf[3] = '0';
  60                 addr = simple_strtoul(argv[2], NULL, 16);
  61                 memcpy(buf+4, &addr, 4);
  62
  63                 printf("%02x %02x %02x %02x - %02x %02x %02x %02x\n",
  64                         buf[0], buf[1], buf[2], buf[3],
  65                         buf[4], buf[5], buf[6], buf[7]);
  66
  67                 ret = mtd->write_oob(mtd, 8, size, (size_t *) &size, (u_char *) buf);
  68         } else
  69                 goto usage;
  70
  71         free(buf);
  72         return ret;
  73
  74 usage:
  75         free(buf);
  76         printf("Usage:\n%s\n", cmdtp->usage);
  77         return 1;
  78 }
  79
  80 U_BOOT_CMD(dynenv, 3, 1, do_dynenv,
  81         "dynenv  - dynamically placed (NAND) environment\n",
  82         "dynenv set off - set enviromnent offset\n"
  83         "dynenv get     - get environment offset\n");
  84
  85 #endif /* CFG_ENV_OFFSET_OOB */